External Peplink 5G or 4G/LTE Adapter?

I am searching for an external Peplink 5G or fast 4G/LTE adapter to be operated via WAN (Lan-cable) or USB with our B One or Two routers.
The B One / Two is mounted inside of our IT rack. In addition to the lower maintenance contract costs, this is the second reason why we decided against ordering a B One 5G.
The B One / Two is connected via WAN (Lan cable) to a GigaCube Huawei B818-263 (CAT-19) adapter using T-Mobile LTE in Germany placed on top of the IT-rack and connected to an external FTS Clear Window MIMO 5G antenna. The throughput is ok, but the Gigacube is old (+ no more fw-updates) and should be replaced.

I thought that the MAX Adapter LTE-A Pro (CAT-12) – Global could be a good fit (even thought it is a bit slower than the CAT19 Gigacube) or the corresponding 5G model.
But according to my Peplink partner, both are not further listed and can’t be purchased in Germany, anymore.
So I am reaching out to the PL community asking if you can recommend a suitable replacement adapter for me to be placed on our rack and operated with our MIMO antenna (2 SMA ports)?

Kind regards, Chris

I am currently trying to figure out how to connect the new Peplink 5G Adapter to an olde MAX Transit LTE cellular router in order to update the WAN connections to 5G.

Pepwave 5G Adapter Datasheet

Thank you. Seems not to be availabe for Europe/Germany, yet? Do I need a 4x external MIMO antenna for this device / 5G or can it run with my 2 x MIMO antenna as well?